Diff: Websocket.h

Revision:

8:a909ee26be2d

Parent:

6:86e89a0369b9

Child:

9:6275000e9224

--- a/Websocket.h	Fri Feb 08 12:33:04 2013 +0000
+++ b/Websocket.h	Sun Jan 31 07:12:25 2016 +0000
@@ -1,144 +1,193 @@
-/**
-* @author Samuel Mokrani
-*
-* @section LICENSE
-*
-* Copyright (c) 2011 mbed
-*
-* Permission is hereby granted, free of charge, to any person obtaining a copy
-* of this software and associated documentation files (the "Software"), to deal
-* in the Software without restriction, including without limitation the rights
-* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-* copies of the Software, and to permit persons to whom the Software is
-* furnished to do so, subject to the following conditions:
-*
-* The above copyright notice and this permission notice shall be included in
-* all copies or substantial portions of the Software.
-*
-* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-* THE SOFTWARE.
-*
-* @section DESCRIPTION
-*    Simple websocket client
-*
-*/
-
-#ifndef WEBSOCKET_H
-#define WEBSOCKET_H
-
-#include "mbed.h"
-
-#include "TCPSocketConnection.h"
-
-/** Websocket client Class.
- *
- * Example (ethernet network):
- * @code
- * #include "mbed.h"
- * #include "EthernetInterface.h"
- * #include "Websocket.h"
- *
- * int main() {
- *    EthernetInterface eth;
- *    eth.init(); //Use DHCP
- *    eth.connect();
- *    printf("IP Address is %s\n\r", eth.getIPAddress());
- *   
- *    Websocket ws("ws://sockets.mbed.org:443/ws/demo/rw");
- *    ws.connect();
- *   
- *    while (1) {
- *        int res = ws.send("WebSocket Hello World!");
- *
- *        if (ws.read(recv)) {
- *            printf("rcv: %s\r\n", recv);
- *        }
- *
- *        wait(0.1);
- *    }
- * }
- * @endcode
- */
- 
-class Websocket
-{
-    public:
-        /**
-        * Constructor
-        *
-        * @param url The Websocket url in the form "ws://ip_domain[:port]/path" (by default: port = 80)
-        */
-        Websocket(char * url);
-
-        /**
-        * Connect to the websocket url
-        *
-        *@return true if the connection is established, false otherwise
-        */
-        bool connect();
-
-        /**
-        * Send a string according to the websocket format (see rfc 6455)
-        *
-        * @param str string to be sent
-        *
-        * @returns the number of bytes sent
-        */
-        int send(char * str);
-
-        /**
-        * Read a websocket message
-        *
-        * @param message pointer to the string to be read (null if drop frame)
-        *
-        * @return true if a websocket frame has been read
-        */
-        bool read(char * message);
-
-        /**
-        * To see if there is a websocket connection active
-        *
-        * @return true if there is a connection active
-        */
-        bool is_connected();
-
-        /**
-        * Close the websocket connection
-        *
-        * @return true if the connection has been closed, false otherwise
-        */
-        bool close();
-
-        /*
-        * Accessor: get path from the websocket url
-        *
-        * @return path
-        */
-        char* getPath();
-
-    private:
-
-        void fillFields(char * url);
-        int parseURL(const char* url, char* scheme, size_t maxSchemeLen, char* host, size_t maxHostLen, uint16_t* port, char* path, size_t maxPathLen); //Parse URL
-        int sendOpcode(uint8_t opcode, char * msg);
-        int sendLength(uint32_t len, char * msg);
-        int sendMask(char * msg);
-        int readChar(char * pC, bool block = true);
-        
-        char scheme[8];
-        uint16_t port;
-        char host[32];
-        char path[64];
-        
-        TCPSocketConnection socket;
-
-        int read(char * buf, int len, int min_len = -1);
-        int write(char * buf, int len);
-};
-
-#endif
+/**
+* @author Samuel Mokrani
+*
+* @section LICENSE
+*
+* Copyright (c) 2011 mbed
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+* THE SOFTWARE.
+*
+* @section DESCRIPTION
+*    Simple websocket client
+*
+*/
+
+#ifndef WEBSOCKET_H
+#define WEBSOCKET_H
+
+#include "mbed.h"
+
+#include "TCPSocketConnection.h"
+
+/** Websocket client Class.
+ *
+ * Example (ethernet network):
+ * @code
+ * #include "mbed.h"
+ * #include "EthernetInterface.h"
+ * #include "Websocket.h"
+ *
+ * int main() {
+ *    EthernetInterface eth;
+ *    eth.init(); //Use DHCP
+ *    eth.connect();
+ *    printf("IP Address is %s\n\r", eth.getIPAddress());
+ *   
+ *    Websocket ws("ws://sockets.mbed.org:443/ws/demo/rw");
+ *    ws.connect();
+ *   
+ *    while (1) {
+ *        int res = ws.send("WebSocket Hello World!");
+ *
+ *        if (ws.read(recv)) {
+ *            printf("rcv: %s\r\n", recv);
+ *        }
+ *
+ *        wait(0.1);
+ *    }
+ * }
+ * @endcode
+ */
+ 
+class Websocket
+{
+    public:
+    class MemBuf {
+    public:
+	static const int maxsize = 1024;	// more than 200
+	char  mem[maxsize];
+	char*  ptr;
+	ssize_t  size;
+
+	MemBuf () {
+	    init ();
+	};
+	~MemBuf () {};
+	void  init () {
+	    ptr = mem;
+	    size = 0;
+	};
+	size_t  alloc (size_t s) {
+	    if (maxsize - (ptr - mem + size) >= s) {
+		return s;
+	    } else {
+		memmove (mem, ptr, size);
+		ptr = mem;
+		if (maxsize - size >= s) {
+		    return s;
+		} else {
+		    return maxsize - size;
+		}
+	    }
+	};
+	void  skip (size_t s) {
+	    ptr += s;
+	    size -= s;
+	};
+	void  skipTo (char* p) {
+	    size -= p - ptr;
+	    ptr = p;
+	};
+    };
+
+        /**
+        * Constructor
+        *
+        * @param url The Websocket url in the form "ws://ip_domain[:port]/path" (by default: port = 80)
+        */
+        Websocket(const char * url);
+	~Websocket ();
+
+	void  setFnPing (void (*fn)());
+
+        /**
+        * Connect to the websocket url
+        *
+        *@return true if the connection is established, false otherwise
+        */
+        bool connect();
+
+        /**
+        * Send a string according to the websocket format (see rfc 6455)
+        *
+        * @param str string to be sent
+        *
+        * @returns the number of bytes sent
+        */
+        int sendOp(uint8_t opcode, size_t len, char* str);
+        int send(char * str);
+        int sendBin(size_t len, char* str);
+
+        /**
+        * Read a websocket message
+        *
+        * @param message pointer to the string to be read (null if drop frame)
+        *
+        * @return true if a websocket frame has been read
+        */
+        bool read(char * message, size_t& size);
+
+        /**
+        * To see if there is a websocket connection active
+        *
+        * @return true if there is a connection active
+        */
+        bool is_connected();
+
+        /**
+        * Close the websocket connection
+        *
+        * @return true if the connection has been closed, false otherwise
+        */
+        bool close();
+
+        /*
+        * Accessor: get path from the websocket url
+        *
+        * @return path
+        */
+        char* getPath();
+
+    private:
+
+        void fillFields(const char * url);
+        int parseURL(const char* url, char* scheme, size_t maxSchemeLen, char* host, size_t maxHostLen, uint16_t* port, char* path, size_t maxPathLen); //Parse URL
+        int sendOpcode(uint8_t opcode, char * msg);
+        int sendLength(uint32_t len, char * msg);
+        int sendMask(char * msg);
+        int readChar(char * pC, bool block = true);
+        
+        char scheme[8];
+        uint16_t port;
+        char host[32];
+        char path[64];
+	void (*fnPing)();
+        
+        TCPSocketConnection socket;
+	MemBuf  membuf;
+
+	int read(char * buf, int len, int min_len = -1);
+	int write(char * buf, int len);
+
+	uint32_t  readLenFrame (char* mask);
+	bool  readBinFrame (char * message, size_t& size);
+	bool  readPing ();
+};
+
+#endif